<!DOCTYPE html>
<html lang="en" xmlns:th="http://www.thymeleaf.org">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
</head>
<body>
<!--会标红，但是没关系-->
<div th:each="userMap:${tList}">
    <div th:each="map:${userMap}">
        <span th:text="${map.key}"></span>
        <div th:each="user:${map.value}">
            <span th:text="${user.id}"></span>
            <span th:text="${user.username}"></span>
            <span th:text="${user.age}"></span>
        </div>
    </div>
</div>
</body>
</html>